Hi All, got a fault with the below machine
Make: Jungheinrich
Model: EFG 216
Serial: FN365149
Year: 2007
System: 48V
Power: 8.0Kw
Hydraulic System: Solo Pilot
Interface System: 3 (6U3)

Fault 036 - Lift Low Voltage
Symptom when mast lift/raise is operated the second speed does not kick in to give a fast raise, checked the potentiometer on the bottom of the lift/lower lever which seems to check ok though cant find any actual test results for it, checked wiring back to Interface 3 which also checks ok though the Interface 3 Board does not seem in good shape the Casing was broken and looks like dampness has been getting in with corroded pins on many of the chips.

Fault INFO 03 - Traction or Lift Controller Temperatur above 83 deg C
Sympton machine will not drive forward or back, so assume its a drive motor temp issue, Is there any way to identify which temp sensor ? and from what can find the temp sensors are with the rpm sensor and are part of both the LH & RH motors is there any test procedure for these sensors can find anything in the manual ?
The only warning light on is item 26 spanner which from manual shows to be Service Display/UVV Display with no other warning lights on the instrument cluster like say controller overtemp or Pump Motor overtemp which would then expect with this fault code

I cant seem to find much info regarding diagnostics for this model as am assuming a lot is either done through the instrument cluster (Information Service Display) or via a com type diagnostic connector on this age of machine with either laptop or standalone unit ?
If anyone can point me in the right direct for testing or instrument cluster diagnostic instructions would be greatly appreciated, ive got ops manual 52025577 which covers 07-2004 on and the service manual